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How to Get Dried Concrete Off a Car

by Melody Buller

Concrete drying on a car can be a perplexing problem for a car owner. However, there are products which claim to safely remove dried concrete from a vehicle without damaging its paint or body. These products are fairly easy to employ, even for a person who is not a car care expert.

The Speedy-Clean Method

To keep a paint job intact, do not scrape or chip hardened cement.

Spray hardened concrete with the solvent until it is saturated. You will see the cement turn white, and then darken. If the cement stays white, spray again until thoroughly saturated.


Allow the solution to set for 10 to 15 minutes.


Soak through again with Speedy-Clean, and the cement will begin to soften.


After 20 to 30 minutes, wipe softened the cement off of the car with the chamois or cloth, and rinse the surface clean with water.

The Back-Set Method

The solvent can be either sprayed or brushed onto the concrete.

Thoroughly soak dried concrete with Back-Set. You may spray the solvent, or if you prefer, brush it into the cement. Be sure to use a brush that will not scratch the vehicle.


Allow Back-Set to set for about 15 to 20 minutes.


Thoroughly soak the cement with the solvent a second time


After about 20 to 30 minutes, rinse away the softened cement with water.

Items you will need

About the Author

Melody Buller has been writing for 15 years. She holds a BA in Religion with a minor in music. Buller currently works for a woodworking company in Northeast Georgia. In her position at Osborne Wood Products, Inc.,she has authored or edited newsletters, press releases, and catalog excerpts. She also writes for the company blog.

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